The role of these brick walls is dual: they provide the structural core of the building, supporting the cantilever of the roof on all sides, while constituting a complex spatial device. Their concave sides create a generous enfilade of varying spaces which unfurls along the glass facade of the pavilion, generating multiple views of the surrounding park and beyond to Paris. On the convex side, the walls combine to form an introverted central core which contains the buildingâ€™s infrastructure: kitchen, sanitary and storage rooms as well as a space for viewing video art.

The core is covered by a concrete roof that is â€śdrapedâ€ť over the walls, creating a complex, double curved surface. A series of individually oriented skylights puncture this surface, channeling proper lighting where necessary and providing selective views of the Habitacle tower and surrounding trees. Seen from the Habitacle tower, this sculpted, perforated roof constitutes a fifth faĂ§ade, revealing the buildingâ€™s internal forms and organization.